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Photometric measurements investigate the characteristics (e.g. performance and ergonomic aspects) of light sources and lighting installations. These characteristics are very important for example for engineers and architects who are carrying out illumination design for products or spaces.
The variables measured by SGS Fimko are:
- Luminous intensity distribution
- Luminance distribution of lamps, luminaires, displays, background-lit symbols (cd/m2)
- Luminous flux (lm = lumen)
- Utilization factor (h)
- Service illuminance (lx = lux)
- Optical power (W = Watt)
- Color rendering power index (Ra-index)
- Color temperature (K= Kelvin)
- Chromaticity coordinates (x and y)
- Spectrum distribution wave of visual light
SGS Fimko carries out measurements of these variables on luminaires for normal use, safety luminaires, incandescent, fluorescent and discharge lamps, control gear for lighting fittings (i.e. electronic terminals) and flat screens.
Luminance distribution of lamps and luminaires
Our new near-field goniophotometer is able to measure the correct luminous intensity distributions of lamps and luminaires in close proximity to the measured object without moving it. This is made possible by the CCD (Charged Coupled Device) camera that is moved around the measuring object and the exact information on the optical imaging system (lens) allows the ‘direction of light’ from each pixel to be calculated. The customer can receive the luminous distribution files in e.g. the following formats:
- EULUM-DAT
- TM14
- IES/86
- IES/91
- IES/95
- CALCULUX
The customer will also receive a separate measuring report. Test report example (PDF 191 KB)
Measurement of the luminance values and luminance distribution of various objects is also possible with our goniophotometer. Luminance values can be determined or obtained from the luminance distribution data that is a kind of "digital photo".
These characteristics are mainly measured with our goniophotometer and integrating sphere (Ulbricht sphere), in which products which are a maximum of 1.8 meters long products can be tested. We use lux meters to measure the utilization factor. Photometric measurements can be carried out in a week as follows:
- In combination with safety, EMC and ROHS testing as well as certification (FI, CB, CB-EMC; GS, ENEC, NRTL)
- As benchmarking tests
- As product development tests
- As quality control tests
An impartial "Statement of Test Result" based on our tests and used as a marketing tool will give you a competitive edge on the market.
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